Abstract:Objective:To introduce a far-infrared ray dryins device.Method:The research background,work tenets, structure,function,technical parameters and tentative application of the device were reported.Chinese medicinal herbs in small pieces which contain volatile oils were dried by far infrared rays and airing. The two drying methods were compared.Result and Conclusion:Not degrading the quality of medicinal herbs in small pieces, the device can be used to dry various kinds of medicinal herb pieces and thus deserves popularization.